Bridging for joists.



No; 702,462. Patented lune i7, i802. C. 0. NELSQN.

BRIDGING FOB JUQSTS.

(Application filed Dec. 23, 1901.] (No Model.)

very rigid structure;

UNITED STATES PATENT Fries.

CHARLES o. NELSON, or WINNETKA, ILLINOIS, Assumes or ELEVEN FIFTEENTHS ro HORACE M. cnrnou, or WINN- E"KA, ILLINOIS BRIDGING FOR JOISTS.

SPECIFICATION forming part Of Letters Patent No. 702,462, dated June 17, 1902.

Application filed December 23,1901. Serial No. 86,9S5i (No model.)

To all whom it may concern:

Be it known that 1, CHARLES O. NELsoN, a

Improvementsin Bridging forJoists, of which the following is a specification.

My invention relates to improvements in metallic bridging or bracing for use in connection with floor-joists and in analogous situations.

The object of my invention is to provide a form of bridge which while exceedingly simple in construction and application and cheap will not be materially ailected by age or atmospheric changes, will not be readily dislaced or loosened, andwill connect the floor- ?oists or similar elements in such a manner as to form, in efiect, a series of trusses and a These and such other objects as may hereinafter appear are attained by the devices illustrated in the accompanying drawings, in which Figure 1 represents a broken cross-section through adjacent joists connected by the pre ferred form ofmy improved bridging. Fig. 2 is a like view of joists connected by a modified form of my'bridging. .Fig. 3 is a broken side View of my improved metallic bridgingpiece in the form shown in Fig. 2. Fig. 4 is a like View of the preferred form of my bridging, and Figs. 5 and 6 are broken perspective views showing alternative forms for the d riving-head of the bridging-piece.

Referring by letter to the accompanying drawings, A represents joists connected by the bridging pieces 13, each of which pieces,

both, in my preferred and modified forms,.

preferably comprises a rod or web 0, two driv- 4o ing-heads 1),and two points E, an gularl y disposed with reference to the web C. The driviug-heads i) may he most remlilyl'ormed by swaging orllattening themclalai'ter the pointed ends E have been turned at an angle to the web 0. j

In the preferred form of my bridging each bridging-piece is formed of sufficient length to be attached to one edge of a joist, extending thence diagonally upward and over the next adjacent joist, and. thence downwardly of the joists which it engages, as shown in Fig. l, as with this construction the bridging-' pieces can be more readily placed under the desired tension, and the strain exerted on each joist through the bridging-pieces will be borne by the full thickness of the joist instead of by a part of its thickness where the bridging-pieces are driven into the edges of the joists, as shown in Fig. 2. If desired, however, the bridging-pieces, whether made in the form shown in Fig. 1 or in that shown in Fig. 2, may be of such a length, as to be driven into the edges of the joists, as in the manner shown in Fig. 2, instead of being passed around the edges and driven into the farther faces of the joists. I prefer, however, to pass the ends of the bridging around the edges of the joists to which .itis to be attached, so as to drive the sharpened ends into the farther face of each of these joists, for the reason that when so bent around the edge of the joists the sharpened end of the bridging will engage the joist at a point in advance of the driving-head, with the result that as the bridging is driven into the joist until the driving-head is Hush with the bridging under the desired tension.

Of course the connections between adjacent joists are made'by the use of my improved bridging members in pairs, which cross each other between joists intho manner shown in the drawings. 7 v

1n the modified form of my device shown in Figs. 2 and 3 the pointed ends are oppo- .sitely bent and each member is of sufficient lcngth only to extend diagonally between loo and engage two adjoining joists. ln applying this form of member one of the drivingpoin'ts ispresented to the surface of onejoist and the other one of the driving-points is presented to the lower surface of the adjacent joist. The points are then driven into the jois In this operation the rod is bent somewhat close to the d riving-heai'ls, as shown in 2.

in using the preferred form of my bridging the hridgingpiece is loosely bentsn'llicient to ,allow of its ends being passed between adjaecmt joists npon opposite sides of an intermediate joist, and. the ends are then driven to placcin the t o outer joists, either in the edges thereof, as shown in Fig. 2, or in the farther faces thereof, as shown in Fig. 1.

Another bridging-piece is then similarly located, so to cross the webs of the first bridging-piece between the adjacent joists. "if desired, in never, it is entirely practical to use my preferred form of bridging, having all oi the bridging members driven into the joists adjacentto one edge thereof only. In this manner the workmen may often work min-.1 more rapidly and conveniently, as it is out that it will be much simpler and easier to drive the bridging members into or edljac-ent to only the upper or lower edges ol? the joists instead of alternately driving them into both the upper and lower edges of the l 'sLs. \Vhen this is one, the long and short forms of my bridging may be used to ad vantage together, the short lengths being nsed to complete the cross connections between the side sills and. the next adjacent joists.

Although I prefer using the form of drivinghcad and point shown in Fig. ll, thatshown s ,in Fig. 3'. although somewhat similar, is sim:

pier, as the brid is i'iotsolieavily swag'ed to make the (diving-head and its end is simply flattened to a bevelcdedge to form a point or engaging or driving into the joist.

(lbvionsly the particular cross sections of the web may be varied without departure rom the spirit of my invention. 7

Having thus described my invention, what lclninr, and desire to secure by Letters Patcut, is

owls with opposiholy-turned points adapted 2:" driven into i b upper and lower portions of adjacent joists, substantially as and'for the purpose set forth;

:3. Animprovedmetallic bridging lorjoists, &c., comprising a body portion or web of sni'- licient length to extend from near the top of one joist to near the bottom of the adjacent joist and provided with oppositely-turned points and adjacent to said points with driv-- ing-heads, substantially as and for the pinpose set forth.

3. Animproved metallic bridging forjoists, &c., comprising a web a,'driving-heads u on opposite sides of the Web a, said driving-heads being formed by swaging the material at the ends of the web, and oppositelytnrned driving-points adjacent to said driving-heads, substantially as and for the purpose set forth.

4. The combination with joists A,A, of metallic bridging members ll, 13' connecting said joists, each of said members extending from the top of one joist to the bottom of the ad jacent joist and having at its ends oppositelytnrned driving-points embedded inthe material of the joists, substantially as and for the purpose set forth.

5. A metallic bridging comprising a web and angularly-disposed ends arranged to extend diagonally between joists and to be secured thereto by having said angular ends driven therein, substantially as described.

0. A metallic bridging for joists comprising a web arranged to extend across one edge of ajoist and thence diagonally to the farther edges of the next adjoining joists on each side thereof, and. sharpened ends adapted to engage each of said adjoining joists, snbstantiallyas described.

7. A metallic bridging comprising a web adapted to extend diagonally between joists, and sharpened ends'angnlarly disposed with relation to said web so as to form drivingheads whereby said ends maybe driven into joists, substantially as described.

8. A metallic bridging comprising a web, sharpened ends angularlyalisposed with re lati-on to said web, the bridging having its sides flattened at the angle between the web and the eiids so as to form driving-heads, substantially as described.

' eimntns o. nntson.

\Vitnesses:

IT. M. CAPHON, 0. it. in nxrrrr. 

